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                               Diodon  # Comments => Habit and Habitat: Diodon is confined to tropical seas, living along near reefs, caves, or ledges, hunting crustaceans and molluscs at night.  Diodon is commonly known as porcupine fish. Its body is rounded, globose, and covered with numerous flexible spines, the organs of defense; they are erected to protect the fish from any external enemy's attack. This fish can also inflate its body by swallowing water. The scales are generally spiny or bony. The caudal fin is rounded and tilted Upwards. The anal fin is opposite to the dorsal fin. There are 3 gills present. The belly is inflatable. The skin is leathery. Although porcupine fishes are poisonous, they are eaten as food fish and are an exotic delicacy in Japan and Indonesia.